Plumber cover letter example

Plumber cover letter example for heat pump retrofits: an opening on the employer's focus, proof from SEAI inspections and gas work, a site meeting close.

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Seán Keane

Qualified Plumber and RGII Registered Gas Installer | Heating, Heat Pumps and Commercial Plumbing

Galway, Ireland

30 October 2026

Declan FahyOperations ManagerClare Coast Energy UpgradesEnnis, Co. Clare

Re: Senior Plumber, heat pump retrofits

Dear Mr Fahy,

I saw your advert for a Senior Plumber at Clare Coast Energy Upgrades. Heat pump retrofits have been the main part of my work for the last four years, and I would like to do more of it with a team focused entirely on energy upgrades.

At Corrib Mechanical Services I have installed or commissioned more than 60 air-to-water heat pump systems in older homes. Every one passed its SEAI grant inspection. Retrofits are rarely straightforward, so I spend time on the heat loss survey and radiator sizing before we start, which avoids cold rooms and callbacks later. On older houses I often upgrade pipework and radiators in the same visit, and I explain to the homeowner what they will notice in the first winter.

I lead a team of two plumbers and an apprentice on 30 to 40 jobs a year, and I also ran the plumbing on a 48-unit apartment scheme, delivering first and second fix two weeks ahead of programme. As an RGII registered gas installer I carry out about 250 boiler services a year, so I can also take on the gas work that often comes with a retrofit.

I price and quote smaller jobs directly, and around 40% of my work now comes from repeat customers or their referrals. I think that matters for a company growing in a region where word of mouth carries a long way.

I have 13 years in the trade, a completed SOLAS apprenticeship and a QQI Level 6 craft certificate. I would be glad to meet you on one of your sites.

Kind regards,

Seán Keane

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How this letter works

What each part of the letter above does, and how to do the same in yours.

The opening

It connects the employer's speciality, energy upgrades, to four years of heat pump retrofits in the second sentence. Contractors in a growing niche look for people who already know it.

Whom to address

Address the operations manager or owner by name; in a regional firm, a phone call to the office will give you it. "Dear Mr Fahy" and "Kind regards" are the usual Irish register.

Requirements matched to proof

The posting asks forHeat pump retrofit experience
The letter shows60+ systems, every one passing SEAI grant inspection.
The posting asks forLead a small team
The letter showsTwo plumbers and an apprentice on 30 to 40 jobs a year.
The posting asks forGas registration
The letter showsRGII registered; about 250 boiler services a year.

Length

Five short paragraphs, inside the usual 250 to 400 words. Trades managers read on site, so each paragraph makes one point with one number.

This letter: 263 words.

The closing

It suggests meeting on site, the natural next step in construction hiring, and keeps the tone direct.

Mistakes to avoid in this letter

  1. Listing every type of job

    Bathrooms, boilers and drains are expected. Pick the work the employer specializes in and prove it.

  2. Leaving out registration

    Gas registration and grant scheme experience are often legal or commercial requirements. Name them.

  3. No customer side

    Repeat customers and referrals tell an employer you leave homes happy. Mention them if you have them.

Questions about this cover letter

Do plumbers need a cover letter in Ireland?
Many firms hire by phone, but a short letter helps for senior roles or specialist work like heat pumps, where you need to show depth.
Should I mention SEAI or grant inspections?
Yes. Passing grant inspections shows quality on the work energy upgrade firms are paid for.
How do I write the letter as a newly qualified plumber?
Describe the phases you completed, the jobs you did on your own and any specialist training. Offer to meet on site.